Which of the following statements is correct?

Options

A. The cis addition of `H_2` to cis-2, 3-dibromobutene produces meso-2,3-dibromobutane
B. The cis addition of `H_2` to trans-2,3-dibromobutene produces meso-2,3-dibromobutane
C. The hydroxylation of cis-2,3-dimethylbutene with Baeyer's reagent produces racemic-2, 3-dihydroxybutane
D. The hydroxylation of trans-2,3-dimethylbutene with Baeyer's reagent produces meso-2,3-dihydroxybutane

Answer

A

Explanation

Hydrogeneation of an alkene is a heterogeneous process which occurs on the surface of a solid catalyst (`PtO_2` or Pd/C). The addition occurs with syn stereochemistry (both hydrogens add from the same side). For cis isomer, the product is a meso compound.